run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array('4' => 'foo', '4x' => 'bar'); $obj = (object)$arr; print_r($obj); print $obj->{4}; print $obj->'4'; print $obj->{'4'};

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).
Note: hhvm uses a JIT which only kicks in after a few runs. Since we run scripts only once, hhvm always runs slower.

VersionSystem time (s)User time (s)Memory (MiB)